CDIO Worldwide Challenge Meng Group Project
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CDIO Worldwide Challenge MEng Group Project Group J Gareth Deering Jorge Guadalupe Fernández Gemma McCallion Andrew McGregor Calum Middleton Sabrina Ralph Website URL – http://xn--y-2fa.no/sab/#future Abstract The 2015 CDIO (Conceive, Design, Implement, Operate) challenge called for the design and build of a folding bicycle that was to be shown and competed at the CDIO Regional Competition on 2nd May 2015. The bike had to be of a lightweight and innovative design that could be folded to a size that would allow city commuters to use it with ease. The first stage of the project was to research the existing market and find a gap that could be filled. It was found that there is a lack of electrically assisted folding bicycles with 20” wheels. Using this information, a number of different concepts were generated and using Pugh’s Total Design process, a final design was found. This design included the desirable electrical assistance as well as a unique ‘slide and fold’ system for folding that allowed for a small folded size. From here, Solidworks and ANSYS were used to bring the design to life and allowed a functioning prototype to be manufactured. Following testing to ensure ANSYS was accurate; this prototype will be taken to the CDIO Regional Competition. i Acknowledgements The group would like to acknowledge the following people for their help during the project. Professor Jim Boyle for his continuous help and support throughout the project. Mr Steven Black and Mr Andrew Irvine for his invaluable help during the building phase. Mr Jim Docherty for the help in ordering all of the components and materials needed to build the bike. All of the people who replied to the survey, without their responses we wouldn’t have had the base knowledge on what the consumer wants. Engineering Faculty and the Department of Mechanical and Aerospace Engineering at University of Strathclyde for the extra funding that allowed us to build the bike to a high specification and also to travel to the competition. Specifically we would like to thank Dr. Gayle Wilson and Professor Donald Mackenzie for arranging the additional funding. Dr Tugrul Comlekci for help with ANSYS and the licencing issues we faced. CDIO initiative for allowing this project to take place and for the opportunity to travel to the regional competition day at Queens University, Belfast. ii Contents Abstract .................................................................................................................................................... i Acknowledgements ................................................................................................................................. ii 1.0 Introduction ...................................................................................................................................... 1 2.0 Project Brief and Plan........................................................................................................................ 2 2.1 Project Brief .................................................................................................................................. 2 2.2 Project Plan ................................................................................................................................... 2 3.0 Risk Assessment ................................................................................................................................ 3 3.1 Computer Skills ............................................................................................................................. 4 3.2 Budget Management .................................................................................................................... 4 3.3 Time Management ........................................................................................................................ 4 4.0 Group Dynamics ................................................................................................................................ 4 5.1 Existing Market ............................................................................................................................. 5 5.2 Consumer Survey .......................................................................................................................... 5 5.3 Regulations.................................................................................................................................... 6 5.3.1 Government Regulations ....................................................................................................... 6 5.3.2 Public Regulations .................................................................................................................. 6 5.4 Research Conclusions .................................................................................................................... 7 6.0 Pugh’s Total Design Process .............................................................................................................. 7 6.1 Statement of Requirements .......................................................................................................... 8 6.2 Product Design Specification (PDS) ............................................................................................... 8 6.3 Concept Generation ...................................................................................................................... 9 7.0 The Final Design .............................................................................................................................. 12 7.1 Material Investigation ................................................................................................................. 12 7.2 Bending calculations ................................................................................................................... 15 7.3 CAD .............................................................................................................................................. 16 7.3.1 Solidworks ............................................................................................................................ 16 7.3.2 ANSYS ................................................................................................................................... 19 8.0 Funding ........................................................................................................................................... 25 9.0 Business Case Plan .......................................................................................................................... 26 10.0 Website ........................................................................................................................................ 28 11.0 Purchasing ..................................................................................................................................... 29 12.0 Manufacture ................................................................................................................................. 30 12.1 Rear Triangle ............................................................................................................................. 30 iii 12.2 Front Forks and Handlebars ...................................................................................................... 30 12.3 Top Tube ................................................................................................................................... 31 12.4 Finished Prototype .................................................................................................................... 31 13.0 Competition .................................................................................................................................. 32 14.0 Conclusions ................................................................................................................................... 33 14.1 The Group Dynamic .................................................................................................................. 33 14.2 The Project ................................................................................................................................ 33 14.3 The Project Management ......................................................................................................... 34 14.0 References .................................................................................................................................... 34 Appendix 1 – Project Plan and Gantt Chart .......................................................................................... 36 Appendix 2 -Group Availability ............................................................................................................. 38 Appendix 3 – Time Spent on Project as a Group .................................................................................. 39 Appendix 4- Existing Products............................................................................................................... 40 Appendix 5 – Consumer Survey and Results ......................................................................................... 42 Appendix 6 – Initial Concepts ............................................................................................................... 45 Appendix 7- Convergence matrix 1 ....................................................................................................... 49 Appendix 8: Handlebars for bending calculations ...........................................................................